A convertible position riding bicycle

Abstract

The application discloses a convertible body position riding bicycle, and relates to the technical field of stunt performance equipment. The application comprises a frame, a supporting cylinder, a rotating cylinder, a handlebar, a walking mechanism and a body position conversion assembly. The body position conversion assembly comprises a power input shaft, a clutch, a worm and a worm wheel. The clutch has a separation state and an engagement state. When the clutch is in the engagement state, the power input by the pedals can drive the rear wheel to rotate to realize the bicycle running, and can be transmitted to the rotating cylinder through the clutch to drive the rider to rotate around the axis of the rotating cylinder to realize the body position conversion. When the clutch is in the separation state, the power input by the pedals can only drive the rear wheel to rotate to realize the bicycle running, and cannot be transmitted to the rotating cylinder through the clutch to drive the rider to rotate around the axis of the rotating cylinder to realize the body position conversion. The engagement state of the clutch is adjusted to switch between the normal riding mode and the body position conversion riding mode, so that the riding flexibility and diversity are enhanced, and the riding fun is improved.

Description

Technical Field

[0001] This invention relates to the field of stunt performance equipment technology, and more specifically to a bicycle with a convertible riding position. Background Technology

[0002] Throughout the history of bicycle development, as people pursue a healthy lifestyle and explore the joy of exercise, the functions and designs of bicycles have been continuously enriched and innovated. Traditional bicycles primarily focused on providing basic transportation, using pedals to drive the front or rear wheel to achieve forward straight-line travel, meeting the basic needs of daily commuting and leisure riding. However, with the deepening development of cycling culture, especially the rise of extreme sports and stunt riding, traditional bicycles have gradually revealed some shortcomings in terms of functionality and experience.

[0003] Traditional bicycles are primarily designed for straight-line movement and lack mechanisms for flexibly adjusting the rider's body position or steering angle during riding, limiting the rider's performance and creativity in specific scenarios (such as stunt performances and extreme challenges). For cycling enthusiasts seeking thrills and novel experiences, the monotonous riding style of traditional bicycles fails to satisfy their higher pursuit of cycling enjoyment and lacks design elements that can inspire a desire for challenge and performance.

[0004] Therefore, how to provide a bicycle that can be steered around and can be flexibly adjusted to change the rider's body position or steering angle, suitable for people using special skills such as stunt performances and extreme challenges, is a concern for those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention aims to provide a bicycle with a convertible riding position to meet the needs of special skill scenarios such as stunt performances and extreme challenges, so that users can flexibly adjust their body position or steering angle while riding, thereby enhancing the flexibility and versatility of riding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bicycle with a switchable riding posture, comprising: Frame; A support cylinder is fixed to the vehicle frame at the center position corresponding to the vehicle frame. A rotating drum is rotatably connected to the upper outer wall of the support cylinder, and a foot support is fixed on its lower outer wall. A handlebar, which is mounted on the outer side wall of the rotating drum via a handlebar bracket; The walking mechanism includes a front wheel, a rear wheel, a drive pedal, and a walking transmission assembly. The front wheel and the rear wheel are rotatably connected to the front end and rear end of the frame, respectively. The drive pedal is rotatably mounted on the pedal bracket. The input end of the walking transmission assembly is driven by the drive pedal, and the output end is driven by the rear wheel. A body position conversion assembly includes a power input shaft, a clutch, a worm gear, and a worm wheel. The power input shaft is arranged perpendicular to the rotating drum and rotatably mounted on the lower outer wall of the rotating drum. Its input end is connected to the output end of the drive pedal via the power input assembly. The clutch is mounted on the power input shaft, and its input end is connected to the output end of the power input shaft. The worm gear is coaxially arranged with the power input shaft and rotatably mounted on the outer wall of the rotating drum, and is connected to the output end of the clutch. The worm wheel is coaxially fixed to the outer wall of the support cylinder and meshes with the worm gear for transmission. The clutch has a disengaged state and an engaged state. When the clutch is engaged, the power input from the driving pedal can be transmitted to the rear wheel through the walking transmission assembly to rotate the rear wheel and propel the bicycle, and can also be transmitted to the rotating drum to rotate the rider around the axis of the rotating drum to change body position. When the clutch is disengaged, the power input from the driving pedal can only be transmitted to the rear wheel through the walking transmission assembly to rotate the rear wheel and propel the bicycle, and cannot be transmitted to the rotating drum through the clutch to rotate the rider around the axis of the rotating drum to change body position.

[0008] The beneficial effects of this solution are as follows: By adjusting the engagement state of the clutch, normal riding can be achieved when the clutch is disengaged, and when the clutch is engaged, the rider's body position can be changed during riding, allowing the rider's body to face different directions. This can be used by people in entertainment venues for special skills such as stunt performances and extreme challenges, enhancing the flexibility and diversity of riding and increasing the enjoyment of riding.

[0009] Furthermore, the walking transmission assembly includes: A drive sprocket, which is connected to the output end of the drive pedal; The first driven sprocket is arranged axially perpendicular to the rotating drum and rotatably mounted on the outer wall of the rotating drum, and is connected to the driving sprocket via a first chain. The lifting cylinder is axially slidably connected inside the support cylinder, and its upper end is connected to the first driven sprocket through a lifting input component to realize lifting movement; The second driven sprocket is rotatably mounted in the middle of the frame and is connected to the lower end of the lifting cylinder via a lifting output assembly. The third driven sprocket is mounted on the axle of the rear wheel and is connected to the second driven sprocket via a second chain.

[0010] The beneficial effects that can be achieved by adopting the above technical solution are as follows: the driving sprocket drives the first driven sprocket to rotate, which drives the lifting cylinder to reciprocate up and down through the lifting input component, and then the lifting output component converts the reciprocating up and down of the lifting cylinder into the rotation of the second driven sprocket, which in turn drives the third driven sprocket on the rear wheel to rotate, thereby realizing the rotation of the rear wheel.

[0011] Furthermore, the lifting input component includes: A crank-connecting rod mechanism, wherein the input end of the crank-connecting rod mechanism is connected to the first driven sprocket; A first rotating sleeve is rotatably mounted on the upper outer side wall of the lifting cylinder; The lifting crossbar has a sliding hole on the upper side wall of the rotating cylinder. The lifting crossbar is located above the support cylinder, and one end of it is fixed to the first rotating sleeve. The other end passes through the sliding hole of the lifting crossbar and is connected to the output end of the crank-connecting rod mechanism.

[0012] The beneficial effects that can be achieved by adopting the previous technical solution are: the rotation of the first driven sprocket is converted into the reciprocating lifting motion of the lifting cylinder by using the crank-connecting rod mechanism, and the torque separation between the two is achieved by connecting the first rotating sleeve with the rotation of the lifting cylinder, so that the lifting cylinder only performs lifting motion and does not rotate with the rotating cylinder.

[0013] Furthermore, the lifting output component includes: Two multi-link swing arms are symmetrically arranged on both sides of the lower end of the lifting cylinder, and their upper ends are hinged to the lifting cylinder. Two ratchet wheels are arranged at intervals along the axial direction of the second driven sprocket and are rotatably connected to the axle of the second driven sprocket. The two ratchet wheels are respectively fixed to the lower ends of the two multi-link rocker arms, and their ratchet teeth are in opposite directions. Two pawls are mounted on the axle of the second driven sprocket and engage with the two ratchet wheels respectively for transmission.

[0014] The beneficial effects that can be achieved by adopting the previous technical solution are: through the cooperation of the multi-link swing arm and the ratchet pawl, the reciprocating lifting motion of the lifting cylinder is converted into the rotational motion of the second driven sprocket.

[0015] Furthermore, the power input assembly includes a power input chain and a power input sprocket, the power input sprocket being coaxially arranged and fixedly connected to the power input shaft; the power input chain drivingly connects the power input sprocket and the drive sprocket.

[0016] The beneficial effects that can be achieved by adopting the previous technical solution are: the power output by the drive sprocket is transmitted to the power input sprocket through the power input chain, and then to the power input shaft.

[0017] Furthermore, the clutch includes: The clutch slide sleeve has a plug rod fixed at one end of the worm gear, one end of the clutch slide sleeve is slidably sleeved on the plug rod, and the other end is slidably sleeved on the power input shaft, and a limiting groove is provided on its side wall to pass through the other end of the sleeve. A limiting pin is fixed to the shaft body of the power input shaft and can be locked in place with the limiting slot. The clutch outer sleeve is rotatably sleeved on the outer side wall of the clutch sliding sleeve, and is slidably connected to the outer wall of the rotating cylinder along its axial direction. The clutch cable has one end fixedly connected to the clutch outer sleeve, so that the clutch slide sleeve can be driven to slide through the clutch outer sleeve, thereby locking or unlocking the clutch slide sleeve and the limit pin. A clutch actuator is mounted on the handlebars, and its output end is drive-connected to the clutch cable.

[0018] The beneficial effects achievable by adopting the previous technical solution are as follows: When the clutch lever is released, the clutch sleeve and the power input shaft are no longer circumferentially restricted, achieving torque separation between the two. The drive sprocket drives the power input shaft to idle through the power input assembly. When the clutch lever is pressed, the clutch cable drives the clutch outer sleeve to pull the clutch sleeve axially. The limit slot and the limit pin are connected, and the torque transmitted from the drive sprocket to the power input shaft can be transmitted to the clutch sleeve, and then to the worm gear, causing the worm gear to rotate synchronously. The meshing of the worm gear and worm wheel realizes the rotational movement of the drum relative to the support cylinder, thereby causing the rider to adjust their body direction.

[0019] Furthermore, a steering mechanism is also provided, the steering mechanism comprising: A handlebar steering assembly includes an upper steering wheel, an upper guide wheel, and an upper loop cable. The handlebars are rotatably mounted on the handlebar bracket via a handlebar axle, and the upper steering wheel is fixed to the bottom of the handlebar axle. The upper guide wheel is axially perpendicular to the spool and rotatably mounted on the outer wall of the spool. The upper loop cable surrounds the outer walls of the upper steering wheel and the upper guide wheel, and is fixedly connected to the upper steering wheel and rotatably connected to the upper guide wheel. A wheel steering assembly includes a front fork, a lower steering wheel, a lower guide wheel, and a lower loop. The front fork is rotatably mounted on the front end of the frame, and the front wheel is rotatably mounted on the lower part of the front fork. The lower steering wheel is fixed to the top of the front fork. The lower guide wheel is axially perpendicular to the rotating cylinder and rotatably mounted on the frame below the support cylinder. The lower loop surrounds the outer side wall of the lower guide wheel and the lower steering wheel, and is fixedly connected to the lower steering wheel and rotatably connected to the lower guide wheel. The lifting assembly includes an upper slider, a lower slider, and a lifting transmission assembly. The upper slider is fixed on the upper ring line between the upper steering wheel and the upper guide wheel; the lower slider is fixed on the lower ring line between the lower steering wheel and the lower guide wheel; the upper slider and the lower slider are connected by the lifting transmission assembly to achieve synchronous lifting.

[0020] The beneficial effects that can be achieved by adopting the previous technical solution are as follows: the rotation of the handlebars is converted into the lifting and lowering motion of the upper slider through the handlebar steering assembly, the upper slider then drives the lower slider to rise and fall through the lifting transmission assembly, and the lifting and lowering of the lower slider is converted into the steering of the front wheel through the wheel steering assembly, thereby realizing the steering of the vehicle.

[0021] Furthermore, the lifting transmission assembly includes: The upper connecting rod has a first sliding hole on the side wall of the rotating drum. One end of the upper connecting rod is fixedly connected to the upper slider, and the other end extends through the first sliding hole into the rotating drum. A steering sleeve is disposed inside the rotating cylinder and is fixedly connected to the other end of the upper connecting rod; The steering inner cylinder is rotatably sleeved on the inner side wall of the steering sleeve and is axially slidably connected to the outer side wall of the support cylinder. The lower connecting rod has a second sliding hole on the side wall of the support cylinder. One end of the lower connecting rod is fixedly connected to the steering inner cylinder, and the other end extends through the second sliding hole into the inner cavity of the support cylinder. A pull rod, the upper end of which is fixedly connected to the other end of the lower connecting rod, and the lower end of which extends to the bottom of the support cylinder; the lower slider is fixed to the lower end of the pull rod.

[0022] The beneficial effects that can be achieved by adopting the above technical solution are as follows: the upper slider drives the steering sleeve to rise and fall through the upper connecting rod, the steering sleeve drives the steering inner cylinder to rise and fall, the steering inner cylinder drives the lower connecting rod to rise and fall, the lower connecting rod drives the tie rod to rise and fall, thereby driving the lower slider to rise and fall; during this process, the steering sleeve and the steering inner cylinder can rotate relative to each other to achieve torque separation and avoid interference between the handlebar steering assembly and the wheel steering assembly caused by the rotation of the cylinder.

[0023] Furthermore, a braking mechanism is also provided, the braking mechanism comprising: A brake control unit, which is mounted on the handlebars; A brake lever is disposed in the inner cavity of the lifting cylinder, and its upper sidewall is axially slidably connected to the rotating cylinder through a slide; its upper end is connected to the output end of the brake control unit through a brake input line. A tie rod sleeve is axially slidably installed on the lower inner wall of the support cylinder, and its lower side wall is rotatably connected to the tie rod. A reversing wheel, which is rotatably mounted on the vehicle frame; Brake calipers, the brake calipers being mounted on the front wheel and the rear wheel; A brake output cable, one end of which is connected to the lever sleeve, and the other end of which passes around the reversing wheel and connects to the brake caliper.

[0024] The beneficial effects that can be achieved by adopting the above technical solution are: the brake control unit drives the brake lever to rise and fall, and then drives the brake output line to move through the lever sleeve to achieve braking. During this process, the relative rotation of the lever sleeve and the brake lever is used to separate the torque between the two, avoiding the reversing wheel, brake caliper, brake output line and other components from rotating with the drum.

[0025] Furthermore, the worm gear is rotatably mounted on the outer wall of the support cylinder, and the two can be locked together by a locking device.

[0026] The beneficial effects that can be achieved by adopting the above technical solution are as follows: when the locking device is locked, it can fix the worm gear and the outer support cylinder relative to each other, thereby locking them and ensuring the stability of the rotating cylinder on the worm. When the locking device is unlocked, it can release the relative fixation between the worm gear and the outer support cylinder, allowing them to rotate relative to each other. This allows the rider's position to be adjusted by manually rotating the worm gear when the rider stops riding.

[0027] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a bicycle with interchangeable riding positions, which has the following beneficial effects: 1. By adjusting the engagement state of the clutch, normal riding can be achieved using the walking mechanism when the clutch is disengaged. When the clutch is engaged, the rider's body position can be changed during riding by cooperating with the walking mechanism and the body position conversion component, allowing the rider's body to face different directions. This can be used by people in entertainment venues for special skills such as stunt performances and extreme challenges, enhancing the flexibility and diversity of riding and increasing the enjoyment of riding.

[0028] 2. Regardless of whether the pedal rotates forward or backward, the lifting input component can convert it into the lifting motion of the lifting cylinder, which is then converted into the forward rotation of the second driven sprocket by the double ratchet lifting output component, thus ensuring that the bicycle keeps moving forward.

[0029] 3. The steering mechanism enables the vehicle to be steered during riding, allowing it to move in different directions.

[0030] 4. The braking mechanism enables braking during riding, ensuring riding safety.

[0031] 5. The locking mechanism allows for manual rotation of the worm gear, enabling manual adjustment of the body's orientation. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 This is a front view structural diagram of a bicycle with a convertible riding position provided by the present invention.

[0034] Figure 2 This is a three-dimensional structural diagram of a bicycle with a convertible riding position, provided by the present invention.

[0035] Figure 3 This is a three-dimensional structural diagram of a bicycle with a changeable riding position provided by the present invention, taken from another angle.

[0036] Figure 4 A cross-sectional structural diagram of the rotary drum, steering inner cylinder, support cylinder, lifting cylinder, and brake lever provided for this invention.

[0037] Figure 5 This is a schematic diagram of the lifting input component provided by the present invention.

[0038] Figure 6 This is a schematic diagram of the structure of the lifting cylinder and lifting output assembly provided by the present invention.

[0039] Figure 7 for Figure 1 Enlarged structural diagram of section A.

[0040] Figure 8 for Figure 2 Enlarged structural diagram of section B.

[0041] Figure 9 for Figure 3 Enlarged structural diagram of section E in the middle.

[0042] Figure 10 for Figure 3Enlarged structural diagram of section D.

[0043] Figure 11 This is a schematic diagram of the structure of the support cylinder and tie rod sleeve provided by the present invention.

[0044] Figure 12 This is a schematic diagram of the steering mechanism provided by the present invention.

[0045] Figure 13 for Figure 12 Enlarged structural diagram of section E in the middle.

[0046] Figure 14 This is a schematic diagram of the handlebar steering assembly provided by the present invention.

[0047] Figure 15 This is a schematic diagram of the installation structure of the support cylinder and turbine provided by the present invention.

[0048] 1. Frame; 2. Support cylinder; 201. Second sliding hole; 3. Rotary cylinder; 301. Lifting crossbar sliding hole; 4. Handlebar; 5. Front wheel; 6. Rear wheel; 7. Drive pedals; 8. Travel transmission assembly; 801. Drive sprocket; 802. First driven sprocket; 803. Lifting cylinder; 804. Second driven sprocket; 805. Third driven sprocket; 806. Lifting input assembly; 8061. Crank-connecting rod mechanism; 8062. First rotating sleeve; 8063. Lifting crossbar, 807; Lifting output assembly, 8071; Multi-link swing arm, 8072; Ratchet, 8073; Pawl, 9; Body position conversion assembly, 901; Power input shaft, 902; Clutch, 9021; Clutch sleeve, 90211; Limit slot, 9022; Limit pin, 9023; Clutch outer sleeve, 9024; Clutch cable, 9025; Clutch actuator, 903; Worm gear, 904; Worm wheel, 905; Power input. Sprocket, 1001; Handlebar Steering Assembly, 10011; Upper Steering Wheel, 10012; Upper Guide Wheel, 10013; Upper Loop Cable, 1002; Wheel Steering Assembly, 10021; Front Fork, 10022; Lower Guide Wheel, 10023; Lower Steering Wheel, 10024; Lower Loop Cable, 1003; Dropper Assembly, 10031; Upper Slider, 10032; Lower Slider, 10033; Upper Linkage, 10034; Steering Sleeve, 10035; Rotary 10036. Inner cylinder, lower connecting rod, 10037. Pull rod, 11. Brake mechanism, 1101. Brake control unit, 1102. Brake lever, 1103. Pull rod sleeve, 1104. Reversing wheel, 1105. Brake caliper, 1106. Brake output line, 1107. Brake input line, 1108. First guide sleeve, 1109. Second guide sleeve, 12. Saddle, 13. Foot pedal bracket, 14. Handle bracket, 15. Locking element, 16. Tensioner wheel. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Please see Figures 1-11 The present invention discloses a bicycle with a convertible riding position, comprising: a frame 1, a support cylinder 2, a swivel cylinder 3, handlebars 4, a walking mechanism, and a riding position conversion component 9; The support cylinder 2 is fixed to the frame 1 at its center position, serving as the support base for the other components. The rotating cylinder 3 is rotatably sleeved on the upper outer wall of the support cylinder 2, and a pedal bracket 13 is fixed on its lower outer wall for mounting the drive pedal 7. A saddle 12 is mounted on the side of the outer wall of the rotating cylinder 3 opposite to the pedal bracket 13, allowing the rider to ride in a seated position. The handlebars 4 are mounted on the outer wall of the rotating cylinder 3 via handlebar brackets 14 and are arranged on the same side as the drive pedal 7.

[0053] The walking mechanism includes a front wheel 5, a rear wheel 6, a drive pedal 7, and a walking transmission assembly 8. The front wheel 5 and the rear wheel 6 are rotatably connected to the front and rear ends of the frame 1, respectively, to drive the bicycle forward. The drive pedal 7 is rotatably mounted on the pedal bracket 13. The input end of the walking transmission assembly 8 is connected to the drive pedal 7, and the output end is connected to the rear wheel 6. The drive pedal 7 and the walking transmission assembly 8 drive the rear wheel 6 to rotate, thereby driving the bicycle forward.

[0054] The body position conversion assembly 9 includes a power input shaft 901, a clutch 902, a worm gear 903, and a worm wheel 904. The power input shaft 901 is arranged perpendicularly to the rotating cylinder 3 and rotatably mounted on the lower outer wall of the rotating cylinder 3. Its input end is connected to the output end of the drive pedal 7 through the power input assembly. The clutch 902 is mounted on the axle of the power input shaft 901, and its input end is connected to the output end of the power input shaft 901. The worm gear 903 is arranged perpendicularly to the rotating cylinder 3 and rotatably mounted on the outer wall of the rotating cylinder 3, and is connected to the output end of the clutch 902. The worm wheel 904 is coaxially fixed to the outer wall of the support cylinder 2 and meshes with the worm gear 903 to achieve rotation of the rotating cylinder 3 around the support cylinder 2 through the meshing of the worm wheel 904 and the worm gear 903. The clutch 902 has a disengaged state and an engaged state. When the clutch 902 is engaged, the power input from the pedal 7 can be transmitted to the rear wheel 6 through the drive transmission assembly 8 to rotate the rear wheel 6 and move the bicycle. It can also be transmitted to the swivel drum 3 through the clutch 902 to rotate the rider around the axis of the swivel drum 3 and change the rider's position. When the clutch 902 is disengaged, the power input from the pedal 7 can only be transmitted to the rear wheel 6 through the drive transmission assembly 8 to rotate the rear wheel 6 and move the bicycle. It cannot be transmitted to the swivel drum 3 through the clutch 902 to rotate the rider around the axis of the swivel drum 3 and change the rider's position.

[0055] Specifically, the walking transmission assembly 8 includes: a drive sprocket 801, a first driven sprocket 802, a lifting cylinder 803, a second driven sprocket 804, and a third driven sprocket 805. The axle of the drive sprocket 801 is fixed to the output end of the drive pedal 7; the first driven sprocket 802 is axially arranged perpendicular to the rotating cylinder 3 and rotatably mounted on the outer wall of the rotating cylinder 3, and is connected to the drive sprocket 801 via a first chain; the lifting cylinder 803 is axially slidably connected inside the support cylinder 2, and its upper and lower ends both extend to the outside of the support cylinder 2, and its upper end is connected to the first driven sprocket 802 via a lifting input assembly 806 to perform lifting movement; the second driven sprocket 804 is rotatably mounted in the middle of the frame 1, and is connected to the lower end of the lifting cylinder 803 via a lifting output assembly 807; the third driven sprocket 805 is rotatably mounted on the axle of the rear wheel 6, and is connected to the second driven sprocket 804 via a second chain. The drive pedal 7 drives the drive sprocket 801 to rotate, which in turn drives the first driven sprocket 802 to rotate. The lifting input component 806 converts the rotation of the first driven sprocket 802 into the linear reciprocating motion of the lifting cylinder 803, thereby driving the lifting cylinder 803 to rise and fall along the inner wall of the support cylinder 2. The rising and falling of the lifting cylinder 803 is then converted into the rotation of the second driven sprocket 804 through the lifting output component 807. Finally, the second chain and the third driven sprocket 805 drive the rear wheel 6 to rotate, propelling the bicycle forward.

[0056] More specifically, the lifting input assembly 806 includes: a crank-connecting rod mechanism 8061, a first rotating sleeve 8062, and a lifting crossbar 8063. The input end of the crank-connecting rod mechanism 8061 is connected to a first driven sprocket 802 to convert the rotation of the first driven sprocket 802 into the linear reciprocating motion of the lifting cylinder 803, thereby driving the lifting cylinder 803 to reciprocate up and down. An annular groove is provided on the upper side wall of the lifting cylinder 803, and the first rotating sleeve 8062 is rotatably installed in the annular groove. A lifting crossbar sliding hole 301 is provided on the upper side wall of the rotating cylinder 3. The lifting crossbar 8063 is located above the support cylinder 2, and one end of it is fixed to the first rotating sleeve 8062, while the other end passes through the lifting crossbar sliding hole 301 and is connected to the output end of the crank-connecting rod mechanism 8061 to achieve torque separation between the lifting cylinder 803 and the rotating cylinder 3, thus preventing the lifting cylinder 803 from rotating with the rotating cylinder 3.

[0057] More specifically, the lifting output assembly 807 includes: two multi-link swing arms 8071, two ratchet wheels 8072, and two pawls 8073. The two multi-link swing arms 8071 are symmetrically arranged on both sides of the lower end of the lifting cylinder 803, and their upper ends are hinged to the lifting cylinder 803. The two ratchet wheels 8072 are spaced apart along the axial direction of the second driven sprocket 804, and are rotatably connected to the axle of the second driven sprocket 804. The two ratchet wheels 8072 are respectively fixed to the lower ends of the two multi-link swing arms 8071, and their ratchet teeth are in opposite directions. The two pawls 8073 are both mounted on the axle of the second driven sprocket 804 and mesh with the two ratchet wheels 8072 respectively for transmission. When the lifting cylinder 803 is raised or lowered, the ratchet wheels are driven to rotate through the multi-link swing arms 8071, and then the second driven sprocket 804 is driven to rotate through the pawls. Because the two sets of ratchet pawls are arranged in opposite directions, one set of ratchet pawls can convert the downward motion of the lifting cylinder into the forward rotation of the second driven sprocket 804, and the other set of ratchet pawls can convert the upward motion of the lifting cylinder 803 into the forward rotation of the second driven sprocket 804. Thus, regardless of whether the pedal assembly is in the forward or reverse direction, or whether the lifting cylinder 803 is rising or falling, it can drive the bicycle forward in the direction of the front wheel 5.

[0058] Specifically, the 8073 ratchet can be made with an elastic ratchet to reduce rigid wear.

[0059] Specifically, the power input assembly includes a power input chain and a power input sprocket 905. The power input sprocket 905 is coaxially arranged and fixedly connected to the power input shaft 901. The power input chain drives the power input sprocket 905 and the drive sprocket 801. The rotation of the drive sprocket 801 is transmitted to the power input sprocket 905 through the power input chain, and then to the power input shaft 901, driving the clutch 902 to engage or disengage.

[0060] More specifically, the power input chain and the first chain can be two independent chains, or they can share the same chain and be connected to the drive sprocket 801. When two independent chains are used, the drive sprocket 801 includes two coaxially arranged sprockets, which are respectively connected to the corresponding first driven sprocket 802 and power input sprocket 905 via two chains. When a single chain is shared, the drive sprocket 801 includes only one sprocket, and the chain passes sequentially around the sprocket, the first driven sprocket 802, and the power input sprocket 905. In addition, a tensioner 16 can be provided between the first driven sprocket 802 and the power input sprocket 905 to ensure that the chain is tensioned and that power is effectively transmitted.

[0061] Specifically, the clutch 902 includes: a clutch sleeve 9021, a limiting pin 9022, a clutch outer sleeve 9023, a clutch cable 9024, and a clutch actuator 9025; one end of the worm gear 903 is fixed with a plug rod, one end of the clutch sleeve 9021 is slidably sleeved on the plug rod, and the other end is slidably sleeved on the shaft of the power input shaft 901, and a limiting slot 90211 is provided on its side wall, extending through the other end; the limiting pin 9022 is fixed to the shaft of the power input shaft 901 and can engage with the limiting slot 90211. 11. Limit locking; the clutch outer sleeve 9023 is rotatably sleeved on the outer wall of the clutch slide sleeve 9021, and it is slidably connected to the outer wall of the rotating cylinder 3 along its axial direction; one end of the clutch cable 9024 is fixedly connected to the clutch outer sleeve 9023, so as to drive the clutch slide sleeve 9021 to slide through the clutch outer sleeve 9023, thereby realizing the locking or unlocking of the clutch slide sleeve 9021 and the upper limit pin 9022 of the power input shaft 901; the clutch operator 9025 is mounted on the handlebar 4, and its output end is connected to the clutch cable 9024. The clutch actuator 9025 is a manual push-button actuator. By manually pressing the clutch actuator 9025, the clutch cable 9024 is tightened, which drives the clutch outer sleeve 9023 to pull the clutch slide sleeve 9021 to slide away from the worm 903. The limiting pin 9022 on the power input shaft 901 axle is inserted into the limiting slot 90211 on the clutch slide sleeve 9021, thereby locking the power input shaft 901, the clutch slide sleeve 9021 and the worm 903 so that they can rotate synchronously. Then, through the meshing transmission between the worm wheel 904 and the worm 903, the rotating drum 3 can rotate around the support cylinder to enable the rider to turn around. When the clutch lever 9025 is released, the clutch cable 9024 automatically resets, causing the clutch outer sleeve 9023 to pull the clutch slide sleeve 9021 towards the worm 903. The limit pin 9022 disengages from the limit slot 90211, achieving torque separation between the power input shaft 901 and the worm 903. The rotation of the power input shaft 901 is no longer transmitted to the worm 903, and the position change stops at this point.

[0062] More specifically, the outer wall of the clutch sleeve 9021 is provided with a mounting groove for the clutch outer sleeve 9023. The clutch outer sleeve 9023 is rotatably installed in the mounting groove to achieve axial limiting connection between the two.

[0063] Specifically, the outer wall of the clutch sleeve 9021 may have a second limiting pin sliding hole (not shown in the figure) arranged along its axial direction. The second limiting pin sliding hole is located near the worm gear 903, and a second limiting pin is installed on the insert rod. The second limiting pin is slidably installed in the second limiting pin sliding hole to limit the axial sliding of the insert rod and the clutch sleeve 9021. It is understood that the second limiting pin can be a spring pin.

[0064] Specifically, a steering mechanism is also provided, which includes: handlebar steering assembly 1001, wheel steering assembly 1002 and lifting assembly 1003; The handlebar steering assembly 1001 includes an upper steering wheel 10011, an upper guide wheel 10012, and an upper loop 10013; the handlebar 4 is rotatably mounted on the handlebar bracket 14 via a handlebar axle, and the upper steering wheel 10011 is fixed to the bottom of the handlebar axle; the upper guide wheel 10012 is axially perpendicular to the rotating cylinder 3 and rotatably mounted on the outer wall of the rotating cylinder 3; the upper loop 10013 surrounds the outer walls of the upper steering wheel 10011 and the upper guide wheel 10012, and is fixedly connected to the upper steering wheel 10011 and rotatably connected to the upper guide wheel 10012. The wheel steering assembly 1002 includes a front fork 10021, a lower guide wheel 10022, a lower steering wheel 10023, and a lower loop 10024. The front fork 10021 is rotatably mounted on the front end of the frame 1, and the front wheel 5 is rotatably mounted on the lower part of the front fork 10021. The lower steering wheel 10023 is fixed to the top of the front fork 10021. The lower guide wheel 10022 is axially arranged perpendicular to the rotating cylinder 3 and rotatably mounted on the frame 1 below the support cylinder 2. The lower loop 10024 surrounds the outer side wall of the lower guide wheel 10022 and the lower steering wheel 10023, and is fixedly connected to the lower steering wheel 10023 and rotatably connected to the lower guide wheel 10022. The lifting assembly 1003 includes an upper slider 10031, a lower slider 10032, and a lifting transmission assembly. The upper slider 10031 is fixed on the upper ring line 10013 between the upper steering wheel 10011 and the guide wheel; the lower slider 10032 is fixed on the lower ring line 10024 between the lower steering wheel 10023 and the lower guide wheel 10022; the upper slider 10031 and the lower slider 10032 are connected by the lifting transmission assembly to achieve synchronous lifting.

[0065] The handlebar 4 rotates around the handlebar axle, causing the upper steering wheel 10011 to rotate. This pulls the upper loop 10013 to rotate around the upper guide wheel 10012. The movement of the upper loop 10013 causes the upper slider 10031 to move up and down. The upper slider 10031 drives the lower slider 10032 to move up and down through the lifting transmission assembly. The movement of the lower slider 10032 causes the lower loop 10024 to move, which in turn drives the lower steering wheel 10023 to rotate. The rotation of the lower steering wheel 10023 drives the front wheel 5 to rotate left and right through the front fork 10021, thereby adjusting the direction of travel.

[0066] For details, see Figure 13 The lifting transmission assembly includes: an upper connecting rod 10033, a steering sleeve 10034, a steering inner cylinder 10035, a lower connecting rod 10036, and a pull rod 10037. A first sliding hole is provided on the side wall of the rotating drum 3. One end of the upper connecting rod 10033 is fixedly connected to the upper sliding block 10031, and the other end extends through the first sliding hole into the rotating drum 3. The steering sleeve 10034 is disposed inside the rotating drum 3 and fixedly connected to the other end of the upper connecting rod 10033. The steering inner cylinder 10035 is rotatably sleeved... The steering sleeve 10034 is axially slidably connected to the outer side wall of the support cylinder 2; a second sliding hole 201 is provided on the side wall of the support cylinder 2; one end of the lower connecting rod 10036 is fixedly connected to the steering inner cylinder 10035, and the other end extends through the second sliding hole 201 into the inner cavity of the support cylinder 2; the upper end of the pull rod 10037 is fixedly connected to the other end of the lower connecting rod 10036, and the lower end extends to the bottom of the support cylinder 2; the lower slider 10032 is fixed to the lower end of the pull rod 10037. The lifting and lowering of the upper slider 10031 is transmitted to the steering sleeve 10034 through the upper connecting rod 10033. The steering sleeve 10034 drives the steering inner cylinder 10035 to lift and lower. The lifting and lowering of the steering inner cylinder 10035 is transmitted to the tie rod 10037 through the lower connecting rod 10036. The tie rod 10037 drives the lower slider 10032 to lift and lower, thereby driving the lower ring 10024 to move and drive the lower steering wheel 10023 to rotate, so as to drive the front wheels 5 to steer.

[0067] Specifically, a braking mechanism 11 is also provided, which includes: a brake control unit 1101, a brake lever 1102, a lever sleeve 1103, a reversing wheel 1104, a brake caliper 1105, and a brake output cable 1106. The brake control unit 1101 is mounted on the handlebars for easy manual braking. The brake lever 1102 is located in the inner cavity of the lifting cylinder 803, and its upper side wall is axially slidably connected to the first guide sleeve 1108 fixed to the top of the rotating cylinder 3. Its upper end is connected to the output end of the brake control unit 1101 via the brake input line 1107. The brake input line 1107 is axially slidably connected to the second guide sleeve 1109 located above the first guide sleeve 1108 and fixedly connected to the rotating cylinder 3. The lever sleeve 1103 is axially slidably mounted on the lower inner wall of the support cylinder 2, and its lever 10037 is rotatably connected to the lower side wall. The reversing wheel 1104 is rotatably mounted on the frame 1. The brake caliper 1105 is mounted on the front wheel 5 and the rear wheel 6. One end of the brake output line 1106 is connected to the lever sleeve 1103, and the other end passes around the reversing wheel 1104 and is connected to the brake caliper 1105. The brake control unit 1101 pulls the brake lever 1102 up and down via the brake cable, which in turn raises and lowers the lever sleeve 1103, thereby tightening the brake output cable 1106 and causing the brake caliper 1105 to clamp the corresponding wheel for braking. Figure 1-3 Both the front wheel 5 and the rear wheel 6 are equipped with brake calipers 1105, so there are two reversing wheels 1104, namely the front reversing wheel 1104 and the rear reversing wheel 1104. The brake output lines 1106 include the front brake output line 1106 and the rear brake output line 1106. One end of the front brake output line 1106 is connected to the lever sleeve 1103, and the other end passes around the front reversing wheel 1104 and connects to the brake caliper 1105 on the front wheel 5. One end of the rear brake output line 1106 is connected to the lever sleeve 1103, and the other end passes around the rear reversing wheel 1104 and connects to the brake caliper 1105 on the rear wheel 6.

[0068] Specifically, the worm gear 904 is rotatably mounted on the outer wall of the support cylinder 2 and can be locked together by the locking member 15. An insertion hole is provided on the lower side wall of the worm gear 904, and a positioning hole is provided on the side wall of the support cylinder 2. The locking member 15 can pass through the insertion hole and be inserted into the positioning hole. When the locking member 15 is inserted into the positioning hole, the worm gear 904 is locked to the support cylinder 2; when the locking member 15 is disengaged from the positioning hole, the worm gear 904 can rotate relative to the support cylinder 2. Therefore, when the drive pedal 7 is not being pedaled, the worm gear 904 can be manually rotated to drive the worm 903 to rotate, which in turn drives the rotating cylinder 3 to rotate, thereby adjusting the direction of the handlebars 4 and the body orientation. This manual adjustment mode is typically used when the rider has stopped but is still in an angled position, allowing for manual reset. Optionally, the locking member can be a locking pin or a locking screw.

[0069] Specifically, an auxiliary wheel (not shown in the figure) can also be installed on the frame 1 to help maintain the stability of the vehicle during beginner training. The auxiliary wheel can be removed after the beginner has mastered the skills.

[0070] Specifically, the brake cable, brake output cable 1106, upper loop cable 10013, and lower loop cable 10024 can all be made of steel wire rope, and at least at the corresponding corners, rounded corner guide sleeves should be installed to prevent the rope from getting stuck or broken due to hard bending.

[0071] Working principle: 1. Bicycle movement: The rider drives the pedal 7 by pedaling, which drives the drive sprocket 801 to rotate. This, in turn, drives the first driven sprocket 802 to rotate via the first chain. The rotation of the first driven sprocket 802 drives the lifting cylinder 803 to rise and fall via the crank-connecting rod mechanism 8061. The rising and falling of the lifting cylinder 803 drives the second driven sprocket 804 to rotate via the multi-link swing arm 8071, ratchet 8072, and pawl 8073. The rotation of the second driven sprocket 804 drives the rear wheel 6 to rotate via the second chain, thus enabling the bicycle to move.

[0072] 2. Vehicle Steering: When the rider turns the handlebars 4 to the left or right, the upper steering wheel 10011 rotates, which drives the upper slider 10031 to rise and fall via the upper ring cable 10013. The rise and fall of the upper slider 10031 drives the steering inner cylinder 10035 to rise and fall via the steering sleeve 10034. The rise and fall of the steering inner cylinder 10035 drives the tie rod 10037 to rise and fall. The rise and fall of the tie rod 10037 drives the lower slider 10032 to rise and fall. The rise and fall of the lower slider 10032 drives the lower steering wheel 10023 to rotate via the lower ring cable 10024. The lower steering wheel 10023 drives the front wheel 5 to rotate left and right via the front fork 10021, adjusting the forward direction of the front wheel 5 and achieving vehicle steering.

[0073] 3. Rider Body Positioning: The rider controls the clutch 902 via the clutch lever 9025 to switch the clutch 902 from the disengaged state to the engaged state. The power input from the pedal 7 is transmitted through the power input shaft 901 to the worm gear 903. The worm gear 903 and worm wheel 904 drive the rotating cylinder 3 to rotate around the axis of the support cylinder 2. This causes the saddle 12, drive pedal 7, handlebars 4, etc., on it to change direction, thereby adjusting the rider's body orientation and achieving body position switching. During the body position switching process, regardless of the rider's orientation, the bicycle always travels towards the front wheel 5.

[0074] Braking: The rider manually presses the brake control unit 1101, which pulls the brake lever 1102 upward. This, through the lever sleeve 1103, tightens the brake output cable 1106, causing the brake caliper 1105 to clamp the wheel and achieve braking. Conversely, releasing the brake control unit 1101 releases the brake caliper 1105 from the wheel, releasing the brake.

[0075] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0076] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bicycle with a switchable riding posture, characterized in that, include: Frame (1); Support cylinder (2), the support cylinder (2) is fixed on the frame (1) at the center position corresponding to the frame (1); Rotary cylinder (3), which is rotatably sleeved on the upper outer side wall of the support cylinder (2), and a foot pedal bracket (13) is fixed on its lower outer side wall. Handlebar (4), which is mounted on the outer wall of the rotating drum (3) via a handlebar bracket (14); The walking mechanism includes a front wheel (5), a rear wheel (6), a drive pedal (7), and a walking transmission assembly (8). The front wheel (5) and the rear wheel (6) are rotatably connected to the front end and the rear end of the frame (1), respectively. The drive pedal (7) is rotatably mounted on the pedal bracket (13). The input end of the walking transmission assembly (8) is connected to the drive pedal (7), and the output end is connected to the rear wheel (6). The body position conversion assembly (9) includes a power input shaft (901), a clutch (902), a worm (903), and a worm wheel (904). The power input shaft (901) is arranged perpendicular to the rotating drum (3) and rotatably mounted on the lower outer wall of the rotating drum (3). Its input end is connected to the output end of the drive pedal (7) through the power input assembly. The clutch (902) is mounted on the power input shaft (901), and its input end is connected to the output end of the power input shaft (901). The worm (903) is arranged coaxially with the power input shaft (901) and rotatably mounted on the outer wall of the rotating drum (3), and is connected to the output end of the clutch (902). The worm wheel (904) is coaxially fixed to the outer wall of the support cylinder (2) and meshes with the worm (903) for transmission. The clutch (902) has a disengaged state and an engaged state. When the clutch (902) is engaged, the power input from the drive pedal (7) can be transmitted to the rear wheel (6) through the walking transmission assembly (8) to drive the rear wheel (6) to rotate and move the bicycle. It can also be transmitted to the swivel drum (3) through the clutch (902) to drive the rider to rotate around the axis of the swivel drum (3) to change body position. When the clutch (902) is disengaged, the power input from the drive pedal (7) can only be transmitted to the rear wheel (6) through the walking transmission assembly (8) to drive the rear wheel (6) to rotate and move the bicycle. It cannot be transmitted to the swivel drum (3) through the clutch (902) to drive the rider to rotate around the axis of the swivel drum (3) to change body position.

2. The bicycle with interchangeable riding positions according to claim 1, characterized in that, The walking transmission assembly (8) includes: The drive sprocket (801) is connected to the output end of the drive pedal (7) in a transmission connection. The first driven sprocket (802) is axially perpendicular to the rotating drum (3) and rotatably mounted on the outer side wall of the rotating drum (3), and is connected to the driving sprocket (801) via a first chain; The lifting cylinder (803) is axially slidably connected inside the support cylinder (2), and its upper end is connected to the first driven sprocket (802) through the lifting input component (806) to realize lifting movement; The second driven sprocket (804) is rotatably mounted in the middle of the frame (1) and is connected to the lower end of the lifting cylinder (803) via the lifting output assembly (807); The third driven sprocket (805) is mounted on the axle of the rear wheel (6) and is connected to the second driven sprocket (804) via a second chain.

3. The bicycle with interchangeable riding positions according to claim 2, characterized in that, The lift input component (806) includes: A crank-connecting rod mechanism (8061) is provided, wherein the input end of the crank-connecting rod mechanism (8061) is connected to the first driven sprocket (802). The first rotating sleeve (8062) is rotatably mounted on the upper outer side wall of the lifting cylinder (803); The lifting crossbar (8063) has a lifting crossbar sliding hole (301) on the upper side wall of the rotating cylinder (3). The lifting crossbar (8063) is located above the support cylinder (2), and one end of it is fixed to the first rotating sleeve (8062), while the other end passes through the lifting crossbar sliding hole (301) and is connected to the output end of the crank connecting rod mechanism (8061).

4. A bicycle with a convertible riding position according to claim 2, characterized in that, The lifting output component (807) includes: Two multi-link swing arms (8071) are symmetrically arranged on both sides of the lower circumferential arrangement of the lifting cylinder (803), and their upper ends are hinged to the lifting cylinder (803). Two ratchet wheels (8072) are arranged at intervals along the axial direction of the second driven sprocket (804) and are rotatably connected to the axle of the second driven sprocket (804); the two ratchet wheels (8072) are respectively fixed to the lower ends of the two multi-link rocker arms (8071) and their ratchet teeth are in opposite directions; Two pawls (8073) are mounted on the axle of the second driven sprocket (804) and engage with the two ratchet wheels (8072) respectively.

5. A bicycle with a convertible riding position according to claim 2, characterized in that, The power input assembly includes a power input chain and a power input sprocket (905). The power input sprocket (905) is coaxially arranged and fixedly connected to the power input shaft (901). The power input sprocket (905) is connected to the drive sprocket (801) for transmission.

6. A bicycle with interchangeable riding positions according to claim 2, characterized in that, The clutch (902) includes: The clutch sleeve (9021) has a plug rod fixed at one end of the worm (903), and one end of the clutch sleeve (9021) is slidably sleeved on the plug rod, and the other end is slidably sleeved on the power input shaft (901). A limiting groove (90211) is provided on its side wall, which extends through the other end of the sleeve. Limiting pin (9022), the limiting pin (9022) is fixed on the shaft of the power input shaft (901) and can be limited and locked with the limiting slot (90211); The clutch outer sleeve (9023) is rotatably sleeved on the outer side wall of the clutch sliding sleeve (9021), and it is slidably connected to the outer wall of the rotating cylinder (3) along its axial direction. The clutch cable (9024) is fixedly connected at one end to the clutch outer sleeve (9023) so that the clutch outer sleeve (9023) drives the clutch slide sleeve (9021) to slide, thereby locking or unlocking the clutch slide sleeve (9021) and the limit pin (9022). The clutch actuator (9025) is mounted on the handlebar (4) and its output end is connected to the clutch cable (9024).

7. A bicycle with interchangeable riding positions according to claim 2, characterized in that, A steering mechanism is also provided, the steering mechanism comprising: A handlebar steering assembly (1001) includes an upper steering wheel (10011), an upper guide wheel (10012), and an upper loop (10013). The handlebar (4) is rotatably mounted on the handlebar bracket (14) via a handlebar axle, and the upper steering wheel (10011) is fixed to the bottom of the handlebar axle. The upper guide wheel (10012) is axially perpendicular to the drum (3) and rotatably mounted on the outer wall of the drum (3). The upper loop (10013) surrounds the outer walls of the upper steering wheel (10011) and the upper guide wheel (10012), and is fixedly connected to the upper steering wheel (10011) and rotatably connected to the upper guide wheel (10012). A wheel steering assembly (1002) includes a front fork (10021), a lower steering wheel (10023), a lower guide wheel (10022), and a lower loop (10024). The front fork (10021) is rotatably mounted on the front end of the frame (1), and the front wheel (5) is rotatably mounted on the lower part of the front fork (10021). The lower steering wheel (10023) is fixed to the top of the front fork (10021). The lower guide wheel (10022) is axially perpendicular to the rotating cylinder (3) and rotatably mounted on the frame (1) below the support cylinder (2). The lower loop (10024) surrounds the outer sidewalls of the lower guide wheel (10022) and the lower steering wheel (10023), and is fixedly connected to the lower steering wheel (10023) and rotatably connected to the lower guide wheel (10022). The lifting assembly (1003) includes an upper slider (10031), a lower slider (10032), and a lifting transmission assembly. The upper slider (10031) is fixed on the upper ring line (10013) between the upper steering wheel (10011) and the upper guide wheel (10012). The lower slider (10032) is fixed on the lower ring line (10024) between the lower steering wheel (10023) and the lower guide wheel (10022). The upper slider (10031) and the lower slider (10032) are connected by the lifting transmission assembly to achieve synchronous lifting.

8. A bicycle with a convertible riding position according to claim 7, characterized in that, The lifting transmission assembly includes: The upper connecting rod (10033) has a first sliding hole on the side wall of the rotating cylinder (3). One end of the upper connecting rod (10033) is fixedly connected to the upper sliding block (10031), and the other end extends through the first sliding hole into the rotating cylinder (3). Steering sleeve (10034), the steering sleeve (10034) is disposed inside the rotating cylinder (3) and is fixedly connected to the other end of the upper connecting rod (10033); Steering inner cylinder (10035) is rotatably sleeved on the inner side wall of the steering sleeve (10034) and is axially slidably connected to the outer side wall of the support cylinder (2). The lower connecting rod (10036) has a second sliding hole (201) on the side wall of the support cylinder (2). One end of the lower connecting rod (10036) is fixedly connected to the steering inner cylinder (10035), and the other end extends through the second sliding hole (201) into the inner cavity of the support cylinder (2). A pull rod (10037) is fixedly connected at its upper end to the other end of the lower connecting rod (10036), and its lower end extends to the bottom of the support cylinder (2); the lower slider (10032) is fixed at the lower end of the pull rod (10037).

9. A bicycle with a convertible riding position according to claim 2, characterized in that, A braking mechanism (11) is also provided, the braking mechanism (11) comprising: Brake control unit (1101), said brake control unit (1101) is mounted on the handlebar (4); Brake lever (1102), the brake lever (1102) is disposed in the inner cavity of the lifting cylinder (803), and its upper side wall is axially slidably connected to the rotating cylinder (3) through a slide; its upper end is connected to the output end of the brake control unit (1101) through a brake input line (1107); A tie rod sleeve (1103) is axially slidably installed on the lower inner wall of the support cylinder (2), and its tie rod (10037) is rotatably connected to the lower side wall. A reversing wheel (1104) is rotatably mounted on the frame (1); Brake caliper (1105), the brake caliper (1105) is mounted on the front wheel (5) and the rear wheel (6); Brake output line (1106), one end of which is connected to the lever sleeve (1103), and the other end passes around the reversing wheel (1104) and is connected to the brake caliper (1105).

10. A bicycle with a convertible riding position according to claim 2, characterized in that, The worm gear (904) is rotatably mounted on the outer wall of the support cylinder (2), and the two can be locked together by the locking member (15).

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